diff options
Diffstat (limited to 'lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java')
-rw-r--r-- | lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java | 287 |
1 files changed, 146 insertions, 141 deletions
diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java index 03c18e55a2..7f2621923a 100644 --- a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java +++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java @@ -18,19 +18,16 @@ */ package com.ericsson.otp.erlang; -import java.io.Serializable; - /** * Provides a Java representation of Erlang maps. Maps are created from one or * more arbitrary Erlang terms. - * + * * <p> * The arity of the map is the number of elements it contains. The keys and * values can be retrieved as arrays and the value for a key can be queried. - * + * */ -public class OtpErlangMap extends OtpErlangObject implements Serializable, - Cloneable { +public class OtpErlangMap extends OtpErlangObject { // don't change this! private static final long serialVersionUID = -6410770117696198497L; @@ -41,249 +38,257 @@ public class OtpErlangMap extends OtpErlangObject implements Serializable, /** * Create a map from an array of keys and an array of values. - * + * * @param keys * the array of terms to create the map keys from. * @param values * the array of terms to create the map values from. - * + * * @exception java.lang.IllegalArgumentException * if any array is empty (null) or contains null elements. */ public OtpErlangMap(final OtpErlangObject[] keys, - final OtpErlangObject[] values) { - this(keys, 0, keys.length, values, 0, values.length); + final OtpErlangObject[] values) { + this(keys, 0, keys.length, values, 0, values.length); } /** * Create a map from an array of terms. - * - * @param elems + * + * @param keys * the array of terms to create the map from. - * @param start - * the offset of the first term to insert. + * @param kstart + * the offset of the first key to insert. + * @param kcount + * the number of keys to insert. + * @param values + * the array of values to create the map from. + * @param vstart + * the offset of the first value to insert. * @param vcount - * the number of terms to insert. - * + * the number of values to insert. + * * @exception java.lang.IllegalArgumentException * if any array is empty (null) or contains null elements. + * @exception java.lang.IllegalArgumentException + * if kcount and vcount differ. */ public OtpErlangMap(final OtpErlangObject[] keys, final int kstart, - final int kcount, final OtpErlangObject[] values, final int vstart, - final int vcount) { - if (keys == null || values == null) { - throw new java.lang.IllegalArgumentException( - "Map content can't be null"); - } else if (kcount != vcount) { - throw new java.lang.IllegalArgumentException( - "Map keys and values must have same arity"); - } else if (vcount < 1) { - this.keys = NO_ELEMENTS; - this.values = NO_ELEMENTS; - } else { - this.keys = new OtpErlangObject[vcount]; - for (int i = 0; i < vcount; i++) { - if (keys[kstart + i] != null) { - this.keys[i] = keys[kstart + i]; - } else { - throw new java.lang.IllegalArgumentException( - "Map key cannot be null (element" + (kstart + i) - + ")"); - } - } - this.values = new OtpErlangObject[vcount]; - for (int i = 0; i < vcount; i++) { - if (values[vstart + i] != null) { - this.values[i] = values[vstart + i]; - } else { - throw new java.lang.IllegalArgumentException( - "Map value cannot be null (element" + (vstart + i) - + ")"); - } - } - } + final int kcount, final OtpErlangObject[] values, final int vstart, + final int vcount) { + if (keys == null || values == null) { + throw new java.lang.IllegalArgumentException( + "Map content can't be null"); + } else if (kcount != vcount) { + throw new java.lang.IllegalArgumentException( + "Map keys and values must have same arity"); + } else if (vcount < 1) { + this.keys = NO_ELEMENTS; + this.values = NO_ELEMENTS; + } else { + this.keys = new OtpErlangObject[vcount]; + for (int i = 0; i < vcount; i++) { + if (keys[kstart + i] != null) { + this.keys[i] = keys[kstart + i]; + } else { + throw new java.lang.IllegalArgumentException( + "Map key cannot be null (element" + (kstart + i) + + ")"); + } + } + this.values = new OtpErlangObject[vcount]; + for (int i = 0; i < vcount; i++) { + if (values[vstart + i] != null) { + this.values[i] = values[vstart + i]; + } else { + throw new java.lang.IllegalArgumentException( + "Map value cannot be null (element" + (vstart + i) + + ")"); + } + } + } } /** * Create a map from a stream containing a map encoded in Erlang external * format. - * + * * @param buf * the stream containing the encoded map. - * + * * @exception OtpErlangDecodeException * if the buffer does not contain a valid external * representation of an Erlang map. */ public OtpErlangMap(final OtpInputStream buf) - throws OtpErlangDecodeException { - final int arity = buf.read_map_head(); + throws OtpErlangDecodeException { + final int arity = buf.read_map_head(); - if (arity > 0) { - keys = new OtpErlangObject[arity]; - values = new OtpErlangObject[arity]; + if (arity > 0) { + keys = new OtpErlangObject[arity]; + values = new OtpErlangObject[arity]; - for (int i = 0; i < arity; i++) { - keys[i] = buf.read_any(); - values[i] = buf.read_any(); - } - } else { - keys = NO_ELEMENTS; - values = NO_ELEMENTS; - } + for (int i = 0; i < arity; i++) { + keys[i] = buf.read_any(); + values[i] = buf.read_any(); + } + } else { + keys = NO_ELEMENTS; + values = NO_ELEMENTS; + } } /** * Get the arity of the map. - * + * * @return the number of elements contained in the map. */ public int arity() { - return keys.length; + return keys.length; } /** * Get the specified value from the map. - * + * * @param key * the key of the requested value. - * + * * @return the requested value, of null if key is not a valid key. */ public OtpErlangObject get(final OtpErlangObject key) { - if (key == null) { - return null; - } - for (int i = 0; i < keys.length; i++) { - if (key.equals(keys[i])) { - return values[i]; - } - } - return null; + if (key == null) { + return null; + } + for (int i = 0; i < keys.length; i++) { + if (key.equals(keys[i])) { + return values[i]; + } + } + return null; } /** * Get all the keys from the map as an array. - * + * * @return an array containing all of the map's keys. */ public OtpErlangObject[] keys() { - final OtpErlangObject[] res = new OtpErlangObject[arity()]; - System.arraycopy(keys, 0, res, 0, res.length); - return res; + final OtpErlangObject[] res = new OtpErlangObject[arity()]; + System.arraycopy(keys, 0, res, 0, res.length); + return res; } /** * Get all the values from the map as an array. - * + * * @return an array containing all of the map's values. */ public OtpErlangObject[] values() { - final OtpErlangObject[] res = new OtpErlangObject[arity()]; - System.arraycopy(values, 0, res, 0, res.length); - return res; + final OtpErlangObject[] res = new OtpErlangObject[arity()]; + System.arraycopy(values, 0, res, 0, res.length); + return res; } /** * Get the string representation of the map. - * + * * @return the string representation of the map. */ @Override public String toString() { - int i; - final StringBuffer s = new StringBuffer(); - final int arity = values.length; + int i; + final StringBuffer s = new StringBuffer(); + final int arity = values.length; - s.append("#{"); + s.append("#{"); - for (i = 0; i < arity; i++) { - if (i > 0) { - s.append(","); - } - s.append(keys[i].toString()); - s.append(" => "); - s.append(values[i].toString()); - } + for (i = 0; i < arity; i++) { + if (i > 0) { + s.append(","); + } + s.append(keys[i].toString()); + s.append(" => "); + s.append(values[i].toString()); + } - s.append("}"); + s.append("}"); - return s.toString(); + return s.toString(); } /** * Convert this map to the equivalent Erlang external representation. - * + * * @param buf * an output stream to which the encoded map should be written. */ @Override public void encode(final OtpOutputStream buf) { - final int arity = values.length; + final int arity = values.length; - buf.write_map_head(arity); + buf.write_map_head(arity); - for (int i = 0; i < arity; i++) { - buf.write_any(keys[i]); - buf.write_any(values[i]); - } + for (int i = 0; i < arity; i++) { + buf.write_any(keys[i]); + buf.write_any(values[i]); + } } /** * Determine if two maps are equal. Maps are equal if they have the same * arity and all of the elements are equal. - * + * * @param o * the map to compare to. - * + * * @return true if the maps have the same arity and all the elements are * equal. */ @Override public boolean equals(final Object o) { - if (!(o instanceof OtpErlangMap)) { - return false; - } + if (!(o instanceof OtpErlangMap)) { + return false; + } - final OtpErlangMap t = (OtpErlangMap) o; - final int a = arity(); + final OtpErlangMap t = (OtpErlangMap) o; + final int a = arity(); - if (a != t.arity()) { - return false; - } + if (a != t.arity()) { + return false; + } - for (int i = 0; i < a; i++) { - if (!keys[i].equals(t.keys[i])) { - return false; // early exit - } - } - for (int i = 0; i < a; i++) { - if (!values[i].equals(t.values[i])) { - return false; // early exit - } - } + for (int i = 0; i < a; i++) { + if (!keys[i].equals(t.keys[i])) { + return false; // early exit + } + } + for (int i = 0; i < a; i++) { + if (!values[i].equals(t.values[i])) { + return false; // early exit + } + } - return true; + return true; } @Override protected int doHashCode() { - final OtpErlangObject.Hash hash = new OtpErlangObject.Hash(9); - final int a = arity(); - hash.combine(a); - for (int i = 0; i < a; i++) { - hash.combine(keys[i].hashCode()); - } - for (int i = 0; i < a; i++) { - hash.combine(values[i].hashCode()); - } - return hash.valueOf(); + final OtpErlangObject.Hash hash = new OtpErlangObject.Hash(9); + final int a = arity(); + hash.combine(a); + for (int i = 0; i < a; i++) { + hash.combine(keys[i].hashCode()); + } + for (int i = 0; i < a; i++) { + hash.combine(values[i].hashCode()); + } + return hash.valueOf(); } @Override public Object clone() { - final OtpErlangMap newMap = (OtpErlangMap) super.clone(); - newMap.values = values.clone(); - return newMap; + final OtpErlangMap newMap = (OtpErlangMap) super.clone(); + newMap.values = values.clone(); + return newMap; } } |